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1.
French word for breasts.
French: Elle a des gros seins.
English: She has big breasts.
by Mario 22 June 11, 2006
 
2.
The French term for "breasts"; often associated with words such as "large" or "spherical" in relation to shape or stature.
Those are some melon-like seins over yonder.
by FroggyFresh June 15, 2014